Protector for detonator-caps.



UNITED STATES llL/fllEN-lf OFFICE.

GEGRGE L. BILLARD, OF MOGOLLON, NEVI MEXICO, ASSIGNUR TO THE (JhPSEAL COMPANY, OF EL PASO, TEXAS, A CORPORATION OF TEXAS.

Application filed November 15, 19H5.

I o all whom it may concern.'

Be it knoivn that I, Geenen L. Dirmno, a citizen of the United States, und n resr dent of Mogollon, in the county of Socorro and State of New Mexico,lmveinvent ed a certain new and useful Improvement in Protectors for DetonatorCaps, of which the following is a specification.

My present invention relates generally to blasting devices, and more particularly to the detonating cups to which the fuses are attached for blasting purposes, my object being to provide a protecting device thereforin order to seal the inner end of the cap into which the adjacent end of the fuse is projected in use.

A further object of my invention is to provide a protecting device for the above purpose which will be simple in construetion, which will bc inexpensive for the purpose, and which may be rendil i secured in connection with the inner end o thecup und theportion of the fuse adjacent thereto, by `the tools ordinarily used for securing the' in connection with the fuse.

ith these objects in mind, my invention resides in the protecting device to be rlow described in connection with the ac componying drawings, forming a part of Cil.

this specification, und wherein* Figure 1 is a detail perspective view of n. detonator fuse and cap illustrating the prac tical application of my invention;

Fig. 2 is a cross section therethrough laken substantially on line 2 2 of Fi 1;

Fig\ 3 is u detail longitudinal section on un enlarge seule, taken substantially on line 3 3 o Fig, 2;

Fig. 4'is u sectional view through the cap and fuse, prior to the application of my invention thereto, sind Fig. 5 is n longitudinal section through my improved protecting device removed.

Referring now to these figures, I have shown a detonutor cup ut 10 in Figs. 1 to -l inclusive, which is us usual in the form of un elongated cylinder, closed at its outer end 11, and open at its inner end for the reception of the adjacent. end of the fuse 12. the here of the cap being slightly larger than the diameter of the fuse for this purpose.

It is well known,- however, that, in utilizing a detonator of the character shown under water or in damp places, there are many Specification of Letters Patent.

YROTECTOB, FOR DETONA'1`Ol`t-CA-S.

Put-enter! (let. il, 191,7.

Serial Nc.131,432.

instances ot fnilure to explode due lo the encrfmchrnei1t of moisture within the cup, giving rise to more or .less wnsideiuble loss in supplies ns well ns creol* r considerable danger.

In order to ohviute these L -irdvantugegl provide u protecting device insisting of a cylindrical holder 13, open n@ both` ends :ind with its ends crimped us n( 14 for a purpose to be presently described, the dialneter of the cyliinirienl holder ern at its crimped ends being slightly greater than the outside diameter of the cup 10, in order ihut it muy be rendily slipped over the cap to the inner end thereof for the purpose of lapping .the said inner end, of the cap and thus surrounding; i portion of bolli the cup :and the ruse 1L), clearly seen by reference to l `igs- 3 and 4, in the lutter ligure of which the position of the bolder 13 is indicated in dotted lines.

This holder 1?, of the shape described, is formed of' n thin still' material, which, though deformable, is capable. of retaining :i given shape, being deformable by means of the ordinary cup erimper. along n longitndinul line as clem-ly seen by reference to Figs. 1 und 2. whereby to more snugly embrace the portion of the cup and fuse surrounded therclrv. the holder 13 having un inner film or lining 1o of :i plaster water eX- clndiney xnnierizil. such :is piirntl'in which, when llnholder is crimped, ns just above described. is torcrul into the erevices between the fuse 1Q and the intim-ent end of the rop 10. so ns to eleetively seal the lutter Against the ingress of moisture likely to otherwise bring about :i mislire, :is nbore stated.

Thus` the crimped ends 14 ot' the cylindrical holder 13 normally serve to retain the 'lhn or lining 15 in plnce und us guides to the thickness of the film or lining, when originully placed within the holder.

It is obvious that my improved protector will serve to ell'eelively seul the inner end of' the cup and prevent entrance of moisture thereto. without :idr-lino materially to the cost of the suppliesvv und that it will, in eddition, more than sure itk` cost in the reduction of rnistire from dampness, in its use.

1. A protector for detonutor caps, consst' film or lining of a plastic water-excluding material normally carried by and forming a part thereof, for the purpose described.

2. A protector for detonnlor caps, ecnsisting of a deformable cylindrical holder Open at both ends thereof, and having an inner film or lining of a plastic water-ex* cluding material, and also having crimped ends to normally retain the inner film or lining in place and act es a gage to the depth thereof,'for the purpose described.

3. The oombination with a detonator fuse and cap, of a p roteetor including a cylindrical holder crlmped along a longitudinal line around the inner end of the cap and a portion of the fuse adjacent thereto, to snugly embrace the seme, Suid holder lniring :1n inner film or lining of plastic nier-ex cluding material whereby to seul the inner end of the cup around the fuse.

4. A protector for detonntor cams, consisting of' n defornmble cjilindricnl holder, open :it both ends. und provided wiLh an inner film or lining' nl' n plastic wnler-rxclnling material, and with means for holding said film or lining therein es n part {hex-cof.

GEORGE L. Dl LLARI). 

